Question

practice 5: the outer core
write the letter for the correct characteristics under the appropriate column.
inner core outer core
a. causes the earths magnetic field
b. liquid metal
e. hottest layer
c. solid iron and nickel
f. 2,300 km
d. 1,200 km

Explanation:

Step1: Recall Inner Core Characteristics

The inner core is solid iron and nickel (C) as the extreme pressure at the center of the Earth keeps it in a solid state despite high temperatures. It is also about 1,200 km thick (D). And it is the hottest layer (E) due to radioactive decay and residual heat from Earth's formation.

Step2: Recall Outer Core Characteristics

The outer core is liquid metal (B). The movement of this liquid metal (convection currents) causes the Earth's magnetic field (A). The outer core is about 2,300 km thick (F).

Answer:

Inner Core	Outer Core